Abstract: The present invention relates to an apparatus for defrostable ventilation systems which include an element for the transfer of heat from warm exhaust air (taken from inside a building) to cooler exterior fresh air which is drawn into the building, the system using warm interior air as defrost air for defrosting the system during cool weather. The present invention in particular provides an apparatus whereby, during a defrost cycle, the interior defrost air may circulate through both of the fresh air and exhaust air paths for delivery back into the building, i.e. the warm interior air may be confined to circulate from the interior of the building into the ventilation apparatus and back to the interior of the building. The apparatus can thus use interior air as defrost air while diminishing or avoiding the creation of a negative air pressure in the building.

Abstract: The present invention relates to a system whereby a consumer, and in particular a patient, may make a request that information with respect to a drug be transmitted to him or her. In accordance with the present invention, a doctor may provide a patient with an information request post card. The information request post card may, in one aspect, for example, have a first information correlation component and a second postal destination component. The first component may comprise a plurality or correlation groups, each correlation group comprising a said identification symbol and an associated check-off section for being marked so as to designate the said identification symbol, and a consumer identification section for the insertion of postal information of a consumer.

Abstract: A method is provided for assessing the effect of exposure conditions on the recording and reproduction of an optical sound track, comprising,a) providing the optical sound track with an image test pattern which is an image of a desired test pattern, the image test pattern being configured such that the image test pattern will induce a photosensor device to generate a test signal which repetitively alternates between two different states, the image test pattern being applied to the track under predetermined exposure conditions,b) optically scanning the optical sound track with the photosensor device to generate, in response thereto, the test signal which repetitively alternates between two different states,c) comparing the duration of one of the states with duration of the other state so as to obtain a time difference value, andd) comparing the so obtained time difference value with a predetermined time difference value associated with the desired test pattern, any departure from the predetermined time differe

Abstract: An attachment, to increase the efficiency of snow removal of vehicles equipped with a bucket, comprising, in one unit, a first side wing portion and a second side wing portion joined by a rear portion. This attachment is secured to the bucket by hooks, attached to the upper edge of the bucket, that engage slots on the rear portion of the attachment. This attachment can be secured to or released from the bucket of the vehicle solely by pivotal movements of the bucket without requiring the driver to leave his vehicle. The attachment increases the volumetric capacity of the bucket.

Abstract: The invention relates to a plural-compartment dispenser for storing and mixing several components at least one of them a liquid, and in particular to a dispenser comprising a barrel, a plunger, a needle or means to connect same, finger grip or means to connect same, a stopper placed in the barrel between the needle and the plunger, said stopper having a hollow dilated central cavity open proximally and distally by apertures, said proximal aperture being releasably sealed by a bounded or fitted pressure activated blow plug.